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1河南黄河通讯发展的特点1．1通过引进先进的技术和设备,通信水平迅速提高。80年代,河南黄河通信水平仍停留在70年代的水平,陈旧的装备和落后的技术阻碍着黄河通信事业的发展。通信手段主要靠供电或磁石试人工交换机和架空明线线路,通话声音小、杂音大、质量差,很难保证黄河防汛抢险的需要。为了加速发展通信事业,满足黄河下游防洪调度的需要,从1991～1995年期间上级投资了1162．30万元,主要对省局、市局的交换机进行更新换代,引进了国内外先进设备和先进技术。交换机安装了HAR-
1 Henan Yellow River communications development characteristics 1.1 through the introduction of advanced technology and equipment, the rapid increase in the level of communications. In the 1980s, the communication level of the Yellow River in Henan Province still remained at the level of the 1970s. Outdated equipment and outdated technologies hindered the development of the Yellow River communications. Communication means rely mainly on power supply or magnet test overhead switch and overhead line lines, call voice, large noise, poor quality, it is difficult to ensure the needs of the Yellow River flood control. In order to speed up the development of communications and meet the needs of flood control and regulation in the lower reaches of the Yellow River, the superior invested a total of 116.230 million yuan from 1991 to 1995, mainly upgrading the switches of provincial and municipal bureaus and introducing advanced equipment and advanced equipment from home and abroad technology. Switch installed HAR-